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ORP dropping at 5:30am every morning!
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Last week, my ORP reading started to climb. It was reading approx 450 and above, then dropping slightly below overnight. It's been in the tank for about 6mo w/o cleaning so, I took it out and cleaned it with water and vinegar. The reading dropped then seemed to normalize as expected. However, after a few more days, it crept up again. What's a bit weird, is that every morning at 5:30 am, I have a sudden drop. The only thing I can think of is that the sun rise is at about 4:45, meaning at 5:30, it's probably shining into the room which has a huge bay window.
The tank only has 2 small fish b/c others were wiped out from some disease (detailed in another post). Since I was on vaca last week, I havent removed the remaining fish and start the 72 day fallow period.
I wish the apex would keep history a lot longer!
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The probe doesn't get any direct sun, does it?
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I wish the apex would keep history a lot longer!
The length of time apex keeps history is a function of the logging interval and the number of outlets and probes being logged. You can also periodically download logged data and save it for use in a spreadsheet or other analytic tools.
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Randy, here's the pH chart. There were no additives added other than the top off water which is controlled by an ATO/apex. Furthermore, I was out of town for the first 2 of those days. This is th pH chart- Keep in mind that it's shifted by 1 day from the previous one. The largest drop is 457 to 428.
I have a Nest thermostat and its schedule does not correspond to this one, so I've eliminated that. The Apex isnt set to change anything at that time (I chk'd all device settings). The tank does not get direct light, it is in the opposite side of the room from the window but I'm sure there is a change in ambient light at around that time. On day, I'll get up that early and check myself
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Interesting....it does seem to correlate to some extent to the low trough in your pH
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It does but the pH, I'm attributing to the light cycle. I wouldnt expect the ORP to be impacted so precisely to 5:30am.
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A rapid effect at a specific time is likely electrical interference in the measurement.
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I happen to wake up at 5:15 the next day (Thursday). I went downstairs and sat around by the tank just to see if by any chance I could notice something coming on, etc. NADA!
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FWIW, ORP never gets too high on its own without adding oxidizers like ozone. So no need to worry about the ORP, whether it si really rising or just getting dirty (which can make ORP read high).
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awesome! Plenty more to worry about w/tanks
Thanks a bunch Randy!
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You're welcome.
Happy Reefing.
My apex reads a drop every morning 5.39 too. No additives or any other changes.That is around sunrise but my tank is getting a very dim ambient light and is far away from windows. Have been wondering what is going on for a while and found this post. Not really concerned about it but curious to find out.
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Wow, it's cool to see an old post pop back up. Here we are 5 years later and I no longer have an ORP probe. I found it 100% useless for my purposes. Randy was right as always. I replaced it with a 2nd pH probe and got a Calcium Reactor. Best move!! My concerns for tank are now:
1) how am I going to deal w/the overgrown corals in the tank?! They're they are not only running into ea. other but up on the front glass and need to be scraped off.
2) making sure my now old equipment doesn't fail
3) keeping up w/the tank as life has gotten busy w/2 kids
Hope all is well
@Randy Holmes-Farley
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I guess I'm not too worried about it, but my ORP also drops every day, mine is at 5am pretty much on the nose. Apex is new, been doing it the whole time looks like. It sure is curious...
A rapid effect at a specific time is likely electrical interference in the measurement.
There are commercial businesses in my building that open pretty early... I wonder if they could be turning something on at that time. Or maybe the Apex runs some kind of compute job every day at that time, and it draws more power to do it? Anyway, it's peculiar enough that I thought I'd raise my hand too.
I know this is an old thread but how did you get this data lined up so pretty like this?
Sorry… like this from OP… thanks
Date Temp pH ORP Amp_3
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